Composite metallic structure.



0. C. RIXSON.

COMPOSITE METALLIC STRUCTURE.

APPLICATION FILED SEPT.1I,I9I7.

1 ,270,87 1 Patented J uly 2, 1918.

6 3 a I w o II"! TNESS INVENTOR. v Q I OSCAR C. RIXSON, OF NEW ROCHELLE, NEW YORK.

COMPOSITE METALLIC STRUCTURE.

Specification of Letters Patent.

Patented July 2, 1918.

Application filed September 11, 1917. Serial No. 190,789.

To all whom it may concern:

Be it known that I, OSCAR C. RIXSON, a citizen of the United States, residing t New Rochelle, in the county of Westchester and State of New York, have invented certain new and useful Improvements in Composite Metallic Structures, of which the following is a full, clear, and exact description.

This invention relates to composite metallicstructures and more particularly to structures of this character which comprise an iron or steel backing or base which is covered by a sheathing or plating of a higher grade of metal, such as brass, copper, nickel or the like.

The objects of the invention are to provide a composite metallic -construction of this character which is inexpensive to manufacture as compared with a solid article of the more expensive, metal, which will possess the durability and wearing quality necessary for an article which is subjected to hard wear or usage and which is so constructed that the oxidation or rusting of the iron base or backing cannot affect the appearance of the structure or its wearing qualities.

I am aware that heretofore it has been the a practice to coat the surface of iron or steel or other metal, which oxidizes when ex-- posed, with a sheathing or plating of a metal which will not be so affected, this being accomplished both chemically by eleetro-plating processes and mechanically by securing a sheathing or layer of the higher grade of metal to the surface of the iron base or backing. I am also aware that where electroplating processes have been used, it has been found that even if the plating is performed with great care, the plating does not possess great wearing qualities principally because any fault or break in the electro-plate will permit the moisture in the atmosphere to attack the surface of the iron or steel backing and cause rusting or oxidization to occur. The rust then gradually accumulates and eats its way beneath the other portions of the electro-plate until the electro-plate wears off in spots, renderin the article unsightly and unsatisfacto or use requiring it to be replaced or rep ated. It has also been found that if the sheathing is mechanically secured to the base or backing in ac-.

cordance with the usual methods, the difliculty of obtaining a moisture-proof joint between the two parts causes an accumulacomposite metallic structure in which these objections to a composite structure are overcome, and consists primarily in rigidly securing the two component parts of the composite metallic structure together by a layer of water-proof elastic cement. The cement should completely coat the surface of the iron or steel backing or base to which the sheathing of the higher grade material is secured, and will then insure against any rusting of this surface on account of its water-proofing quality so that even after the composite metal structure has been in use under unfavorable atmospheric conditions, the sheathing will not be distorted or separated from its backing by an accumulation of rust. Cement which is elastic and which 'will retain such elasticity after it has been in use for some time is also essential for with an elastic cement any separation of the two components of the structure is prevented even when the structure is subjected to hard usage, which would destroy a cement which is brittle when dry. The cement should also adhere to the surfaces of both the iron and brass members of the structure and not separate from them after being used for a short period of time.

A composite structure constructed in this manner possesses great durability and wearing qualities and does not sound hollow when metal structure of this character is also particularly adapted for plates, and when a plate is so constructed it is preferable to bend over the edges of the sheathing around the iron-base or backing which affords additional strength to the structure.

The invention is capable of a wide use and in the drawings one embodiment is shown in which the composite plate is utilized as the sheathing is struck. A composite sheet kick and push plates for swinging doors, which embodiment is intended to be merely illustrative of the invention.

In the drawings:

Figure 1 shows a swinging door provided with kick and push plates constructed in accordance with the invention; and

Fig. 2 is a section through the kick late.

The door which is indicated 1 may e of any usual construction, as, for example, a swinging door which is carried on the frame 2 by means of hinges 8. The shown at 4 and the kick .plate at 5, both of these plates being secured to the door by screws 6 as is the usual practice. The kick and push plates are each formed from a metallic composite structure, the construction of which is clear from Fig. 2, the kick plate consisting of an iron late or backing 7 over which is secured a s I eath 8 of brass, copper, nickel or other suitable metal which is not affected by atmospheric conditions and which possesses the required ornamental appearance. The plate 7 and the sheath 8 are securedtogether by a layer of waterproof elastic cement 9, which cement should be applied so as to completely cover the surfaces'of the iron and brass plates which are in contact, and care should be exercised that the cement is so disposed and that it firmly adheres to the surfaces of both plates over their entire contacting areas without leaving any spaces which might be formed by air bubbles or the like. The elastic waterproof cement may be made by any suitable formula which will produce the cement which will retain these characteristics and which will continue to firmly adhere to the brass and iron surfaces after the cement has dried to securely bind the plates together. The edges of the brass sheet 9 are preferably bent over the edges of the iron or steel plate 7 as at 10, which will also serve to securely holdthe brass sheetagainst the iron or steel backing plate. After the plate has been formed in; this manner, the holes for the screws 6 may be drilled therein push plate is.

by moisture and a sheathing over said base of a metal which is unattacked by moisture, and a thin layer of waterproof elastic cement of uniform thickness binding the parts into a unitary structure. l

2. A composite metallic structure comprising an iron base, a brass sheathing for" said base, and a layer of uniform thickness of elastic waterproof cement binding said parts together.

3. A composite metallic structure com-' prising a base plate of a metal which is at tacked by the moisture, a sheathing for said plate of a metal which is unattacked by moisture, and a layer of waterproof elastic cement binding said plates together, saidsecond named plate having its. edges bent over the edges of said first named plate.

4. A composite metallic plate comprising two plates of different kinds of metal and a layer of substantially uniform thickness of cement interposed between the plates and' binding them into a unitary structure.

5. A composite metallic late comprising two plates of different kincs of metal and a layer of substantially uniform thickness of I cement interposed between the plates and binding them into a unitary structure, said cement being elastic andwat'erproof and in intimate contact with the entire area of the opposing faces of the plates.

In witness whereof, I subscribe my signature,

- OSCAR C. RIXSON. 

